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The Document Object Model, commonly referred to as the DOM', is the term for elements in an HTML file. Elements are any HTML code denoted by HTML tags, like <div>, <a>, or <p>. Let's use JavaScript to interact with the DOM.

We can select an HTML element with JavaScript by selecting its class attribute, like this:

var header = document.getElementsByClassName('example-class-name');

This would find an element like this in the HTML:

<div class='example-class-name'> ... </div>
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